This study examined ethnic group differences in the rates of eating disorder symptoms (EDS) and depressive disorder symptoms (DDS) with respect to ethnic identity, relative body weight, and abnormal eating behaviors among adolescent girls. A district-wide sample of high school girls (N = 1445) from different ethnic backgrounds was surveyed. EDS were assessed with the Eating Attitudes Test-26, abnormal eating behaviors with the Eating Behaviors Survey, and DDS with the Short Mood and Feelings Questionnaire. Two dimensions of ethnic identity, ethnic identity achievement and other group orientation, were assessed with Multi-Group Ethnic Identity Measure. Hispanic and non-Hispanic white girls had the highest and African-American (AA) and Caribbean girls the lowest rates of EDS. Asian girls reported the highest and AA girls the lowest rates of DDS. Early dieting was associated with EDS and DDS in Caribbean, non-Hispanic white, and mixed background girls. Relative body weight was related to EDS in all ethnic groups except in non-Hispanic white and mixed background girls. The authors did not find an effect of ethnic identity achievement on psychopathology, but there was an effect of other group orientation on both EDS and DDS. Clinicians should inquire about EDS and DDS in girls of all ethnic groups. Prevention efforts to delay unsupervised dieting may protect adolescent girls from the development of EDS and DDS.